| characterization of a variant strain of norwalk virus from a food-borne outbreak of gastroenteritis on a cruise ship in hawaii. | a gastroenteritis outbreak affecting at least 217 (41%) of 527 passengers on a cruise ship was caused by a variant strain of norwalk virus (nv) that is related to but distinct from the prototype nv strain. consumption of fresh-cut fruit served at two buffets was significantly associated with illness (p < or = 0.01), and a significant dose-response relationship was evident between illness and the number of various fresh-cut fruit items eaten. seven (58%) of 12 paired serum specimens from ill pers ... | 1994 | 8027335 |